3 * (C)opyright 1995-1998 Darren Reed. (from tcplog)
5 * See the IPFILTER.LICENCE file for details on licencing.
12 #include <sys/socket.h>
14 #include <sys/ioctl.h>
16 #include <sys/fcntlcom.h>
18 #if (__FreeBSD_version >= 300000)
19 # include <sys/dirent.h>
26 #include <netinet/in.h>
27 #include <netinet/in_systm.h>
28 #include <netinet/ip.h>
29 #include <netinet/ip_var.h>
46 static const char sccsid[] = "@(#)sbpf.c 1.3 8/25/95 (C)1995 Darren Reed";
47 static const char rcsid[] = "@(#)$Id: sbpf.c,v 2.5.4.1 2006/03/21 16:32:58 darrenr Exp $";
51 * the code herein is dervied from libpcap.
53 static u_char *buf = NULL;
54 static int bufsize = 0, timeout = 1;
57 int initdevice(device, tout)
61 struct bpf_version bv;
65 char *bpfname = _PATH_BPF;
68 if ((fd = open(bpfname, O_RDWR)) < 0)
70 fprintf(stderr, "no bpf devices available as /dev/bpfxx\n");
77 for (i = 0; i < 16; i++)
79 (void) sprintf(bpfname, "/dev/bpf%d", i);
80 if ((fd = open(bpfname, O_RDWR)) >= 0)
85 fprintf(stderr, "no bpf devices available as /dev/bpfxx\n");
90 if (ioctl(fd, BIOCVERSION, (caddr_t)&bv) < 0)
92 perror("BIOCVERSION");
95 if (bv.bv_major != BPF_MAJOR_VERSION ||
96 bv.bv_minor < BPF_MINOR_VERSION)
98 fprintf(stderr, "kernel bpf (v%d.%d) filter out of date:\n",
99 bv.bv_major, bv.bv_minor);
100 fprintf(stderr, "current version: %d.%d\n",
101 BPF_MAJOR_VERSION, BPF_MINOR_VERSION);
105 (void) strncpy(ifr.ifr_name, device, sizeof(ifr.ifr_name));
106 if (ioctl(fd, BIOCSETIF, &ifr) == -1)
108 fprintf(stderr, "%s(%d):", ifr.ifr_name, fd);
113 * get kernel buffer size
115 if (ioctl(fd, BIOCGBLEN, &bufsize) == -1)
120 buf = (u_char*)malloc(bufsize);
127 if (ioctl(fd, BIOCSRTIMEOUT, (caddr_t)&to) == -1)
129 perror("BIOCSRTIMEOUT");
133 (void) ioctl(fd, BIOCFLUSH, 0);
139 * output an IP packet onto a fd opened for /dev/bpf
141 int sendip(fd, pkt, len)
145 if (write(fd, pkt, len) == -1)